Governor compensator



June 2, 1942.

H. D. GREEN 2,284,890

GOVERNOR COMPENSATOR Filed May 22, 1959 2 Sheets-Sheet 1 INVENTOR HOWARD D. GREEN BYW ATTORNEY.

June 2, 1942.

H. D. GREEN 2,284,890 GOVERNOR COMPENSATOR Filed May 22, 1939 2 Sheets-Sheet 2 INVENTORY HOWARD D. GREENS ATTORNEY.

Patented June 2, 1942 GOVERNOR ooMPENsA'roR Howard D. Green, Compton, Califl, assignor to MacClatchie Manufacturing Company of California, Compton, Calif., a corporation of Cal ifornia Application lVIay 22, 1939, serial No. 274,994

2 Claims.

My'invention relates to a means of compensating the conventional governor. V

The object of my invention is to provide the conventional governor with a compensating mechanism in order to secure a more sensitive energy in thecompensatin-g mechanism, thereby opening or closing the throttle within much more definite limits thanis possible by means of the conventional governor alone.

In other words if .a change is made in the load on the engine, the governor through the compensating mechanism operates the throttle so that the engine carries the load without a change in engine speed, whereas Without the use of my invention, the conventional governor alone would operate the throttle so that the. engine would carry the load, but only with a change in engine speed.

My invention has, many tages, and features, some of which, with the foregoing, will be set forth at length in the following description where I shall outline one form of my invention, which .I have selected for illustration in the drawings accompanying and forming a part of;the present specification. It is to be understood that I do not limit myself to the form shown in the drawings which has been selected for purposes of illustration since the invention, as expressed in the claims, may be embodied in a large plurality of forms.

Referring to the drawings:

other objects, advan .Figure 1 is a front elevation of an engine provided with the governor compensating mechanism of my invention.

Figure 2 is an enlarged side elevational view, partly in section of the governor compensating mechanism shown in Figure 1.

Inthe drawings, the numeral 9 indicates an engine, provided with a throttle l0 having an arm H, and a conventional governor l2. The governor compensating mechanism is obviously adapted to be used in connection with any type of governor and with any type of engine. For

purposes of illustration I have described it in connection with a radial type of engine, such as shown and described in U. S. Patent No, 2,074,702

which was granted to John W. MacClatohie on March 23, 1937.

Although the governor may be of any type, the governor 12, as shown'is of the said centrifugal type driven by the engine 9, the governor weights actuating the governor control shaft l3 to increase or decrease the energy supplied to the engine. Mounted on the governor control shaft 13 are governor arms l4 and IS. The governor arm I4 is connected .to drag-linkl6, and the other end of the drag-link I6 is connected. to a pivoted arm 11. The upper end of the pivoted arm I! is provided with contact points l8 and f9 which are adaptedto contact points .23 and 2| respectively of movable arms 22 and 23 respectively. The movement of arms 22 and 23 is limited inwardly by stops24 and 25 respectively;

by means of spring 26 when said movable arms are not in contact with pivoted arm I l.

The governor arm I5 is connected to the throttle arm I l by means of drag-links 30 and 3| and compensating link 32which link is adapted to be moved by the compensating mechanism generally indicated by the numeral 38 in housing 39. The compensating link 32 is pivotablymounted on compensating screw-block 33 by means of the pivotal support 40. The compensating screw-block 33 is mounted on compensating screw 34 which is adapted to be rotated by the reversible motor 35, causing the compensating screw-block 33 to move along the compensating screw 34 depending upon the direction of rotation of the reversible motor 35.

The reversible motor 35 is connected .to a source of electrical energy as indicated at 36, and

to contact points l8, I9, 20 and 2| by means of electrical conduits 42, 4| and 43 respectively. Circuit-breakers 31 which are connected to the reversible motor by electrical conduits 44 are also provided in order to limit the travel of the compensating screw-block 33 on the compensating screw 34.

Upon a speed change, due to increase or decrease of load, the governor I2 directly vactuates the throttle control In through arm l5, drag links 30 and 3|, compensating link 32', which is pivotably mounted on the pivotal support of compensating screw-block 33, and arm H. The governor l2 alsoactuates the throttle control 59 through arm I4 and the compensating mechanism to open or close the throttle an additional amount to compensate for thedrop in speed of the prime mover, due to the fact that the 'means of conduits42 and 43.

governor cannot of itself hold the throttle open suflicient to take care for an increased load without there being an actual drop in speed. The compensating mechanism permits the prime mover to return to its original speed, while carrying the increased load.

As the governor arm |4 swings to the left due to increase of load, the drag link IS and pivoted arm H are moved to the left, thereby causing contact points l8 and 20 to contact and close the circuit with reversible motor 35 by means of conduits 4| and 42. As this circuit is closed, electrical energy is induced, which energizes'the reversible motor 35 causing said motor and the compensating shaft 34 to rotate.

As the shaft 34 rotates the compensating screw-block 33 on which the compensating link 32 is pivotably mounted travels along the shaft causing said link 32 to pivot about the link 30 acting as a fulcrum, moving the drag-link 3| and the throttle arm H to the right thereby opening the throttle Ill. The engine 9 will now pick up to its original speed, and after said speed is attained, the governor arm I4 will move to the right thereby moving drag-link l6 and pivoted arm I! to the right, causing contact points I3 and 20 to separate, thereby breaking the circuit and stopping the rotation of the reversible motor 35 leaving the throttle l in position to take care for the new load while the prime mover runs at its original speed.

As the governor arm l4 swings to the right due to decrease of load'the drag line I6 and pivoted arm H are moved to the right, thereby causing contact points l9 and 2| to contact and close the circuit with reversible motor 35 by As this circuit is closed, electrical energy is induced, which energizes the reversible motor 35 causing said motor and the compensating shaft 34 to rotate in a direction opposite to the direction of rotation of said motor and said compensating shaft when the contact points l8 and 20 were in contact.

As the shaft 34 rotates, the compensating screw-block 33 on which the compensating link 32 is pivotably mounted travels along the shaft causing said link 32 to pivot about the link 30 acting as a fulcrum 34 moving the drag-link 3| and the throttle arm thereby closing the throttle ID. The engine 9 will then decrease to its original speed, and after said original speed is attained, the governor arm l4 will move to the left thereby moving drag-link l and pivoted arm H to the left, causing contact points l9 and 2| to separate, thereby breaking the circuit and stopping the rotation of the reversible motor 35 leaving the throttle II] in position to take care for the new load while the prime mover runs at its original speed.

When the circuit is broken by means of contact with either of the circuit-breakers 31, the throttle I0 is adapted to be operated by the governor arm I5.

The spring 26 allows the movable arms 22 and 23 to swing outwardly from stops 24 and 25 respectively when the governor arm l5 operates the throttle Ill directly when large variations of load are applied.

From the foregoing description taken in connection with the accompanyin drawings, the uses, advantages, and operation of my invention will be readily understood by those skilled in the art to which the invention appertains. While I have described the principle of operation together with the form of my invention which I now consider to be the best embodiment thereof, I desire to have it understood that the articles shown are merely illustrative and that the invention is not to be limited to the details disclosed herein, but is to be accorded the full scope of the appended claims.

I claim? 1. The combination of an engine having a throttle, a governor adapted to operate said throttle, and a compensating mechanism operated by said governor, said compensating mechanism comprising a screw, a compensating member adapted for reciprocal movement on said screw, said compensating member being directly connected to said governor and to said throttle, and a member having contact points operatively connected to said governor, one of said contact points being adapted to close a circuit including a reversible motor which is adapted to rotate said screw in one direction when the load on said engine is increased and the other of said contact points being adapted to close a circuit including said reversible motor which is adapted to rotate said screw in the opposite direction when the load on said engine is decreased.

2. The combination of an engine having a throttle, a governor adapted to operate said throttle by means of connecting members, and a compensating mechanism operated by said governor to permit the engine to return to its original speed when the load on said engine is changed, said compensating mechanism comprising a screw, a compensating member adapted for reciprocal movement on said screw, one of said connecting members between the governor and the throttle being pivotably mounted on said compensating member and a member having contact points operatively connected to said governor, one of said contact points being adapted to close a circuit including a reversible motor which is adapted to rotate said screw in one direction when the load on said engine is increased and the other of said contact points being adapted to close a circuit including said reversible motor which is adapted to rotate said screw in the opposite direction when the load on said engine is decreased.

HOWARD D. GREEN. 

